will be generated by attempting which of the following with the Megacities database?
The error message
``` You cannot add or change a record because a related record is required in
table 'Countries'
```
(A) A user tries to enter a record in the table Countries that doesn’t contain data in the
primary key.
(B) A user tries to add a record to a table that is related to the Countries table, and that
record contains a foreign key value that does not correspond to a primary key value in
the Countries table.
(C) A user tries to enter a record to the table Countries with the same primary key as
another record.
(D) The user tries to request a joined table using LINQ.
(B) A user tries to add a record to a table that is related to the Countries table, and that
record contains a foreign key value that does not correspond to a primary key value in
the Countries table.
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